Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 4

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Earn 100

The order of the oxidation state of the phosphorus atom in $H_{3} {PO}_{2}, H_{3} {PO}_{4}, H_{3} {PO}_{3},$ and $H_{4} P_{2} O_{6}$ is:

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Important Questions on Redox Reactions

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 5

When

{KMnO}_{4}

acts as an oxidising agent and ultimately forms

{MnO}_{4}^{2 -}, {MnO}_{2}, {Mn}_{2} O_{3}

and

{Mn}^{2 +}

, then how many electrons transferred in each case ?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 6

Which of the following is a redox reaction?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 7

What is the oxidation state of $Cr$ in ${[Cr {({NH}_{3})}_{4} {Cl}_{2}]}^{+}$ ?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 8

Which of the following chemical reactions depicts the oxidizing behaviour of $H_{2} {SO}_{4}$ ?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 9

Consider the following reaction:

{xMnO}_{4}^{-} + {yC}_{2} O_{4}^{2 -} + {zH}^{+} \to {xMn}^{2 *} + 2 {yCO}_{2} + \frac{z}{2} H_{2} O

The values of

x, y

and

z

in the reaction are, respectively:

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 10

Among the given reactions, Which reaction is an example of a redox reaction?

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 11

Among the following, the number of elements showing only one non-zero oxidation state is

O, F, Cl, N, P, Sn, Tl, Na, Ti

.

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Alpha Question Bank for Engineering: Chemistry>Chapter 6 - Redox Reactions>Exercise-3>Q 13

Standard electrode potential data are used for understanding the stability of an oxidant in a redox titration. Some half reactions and their standard potentials are given below:

{MnO}_{4}^{-} (aq) + 8 H^{+} (aq) + 5 e^{-} \to {Mn}^{2 +} (aq) + 4 H_{2} O (l); E ° = 1.51 V {Cr}_{2} {O_{7}}^{2 -} (aq) + 14 H^{+} (aq) + 6 e^{-} \to 2 {Cr}^{3 +} (aq) + 7 H_{2} O (l); E ° = 1.38 V {Fe}^{3 +} (aq) + e^{-} \to {Fe}^{2 +} (aq); E ° = 0.77 V {Cl}_{2} (g) + 2 e^{-} \to 2 {Cl}^{-} (aq); E ° = 1.40 V

Identify the only incorrect statement regarding the quantitative estimation of aqueous

Fe ({NO}_{3})_{2}

.